Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6371EC433EF for ; Fri, 12 Nov 2021 18:52:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 40B4660E52 for ; Fri, 12 Nov 2021 18:52:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235456AbhKLSzX (ORCPT ); Fri, 12 Nov 2021 13:55:23 -0500 Received: from foss.arm.com ([217.140.110.172]:43712 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229892AbhKLSzV (ORCPT ); Fri, 12 Nov 2021 13:55:21 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 6A2F3101E; Fri, 12 Nov 2021 10:52:30 -0800 (PST) Received: from e113632-lin.cambridge.arm.com (e113632-lin.cambridge.arm.com [10.1.196.57]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 9DB3E3F70D; Fri, 12 Nov 2021 10:52:28 -0800 (PST) From: Valentin Schneider To: linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-kbuild@vger.kernel.org Cc: Peter Zijlstra , Ingo Molnar , Frederic Weisbecker , Mike Galbraith , Marco Elver , Dmitry Vyukov , Steven Rostedt , Masahiro Yamada , Michal Marek , Nick Desaulniers Subject: [PATCH v3 0/4] preempt: PREEMPT vs PREEMPT_DYNAMIC configs fixup Date: Fri, 12 Nov 2021 18:51:59 +0000 Message-Id: <20211112185203.280040-1-valentin.schneider@arm.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi folks, This v3 is mostly about the naming problem - get your paintbrushes ready! Patches ======= o Patch 1 is the meat of the topic - note that it's now in tip/sched/urgent o Patch 2 introduces helpers for the dynamic preempt state o Patches 3-4 make use of said accessors where relevant. Testing ======= Briefly tested the dynamic part on an x86 kernel + QEMU. Compile-tested the kcsan test thingie as a module. Revisions ========= v1: http://lore.kernel.org/r/20211105104035.3112162-1-valentin.schneider@arm.com v1.5: http://lore.kernel.org/r/20211109151057.3489223-1-valentin.schneider@arm.com v2 -> v3 ++++++++ o Turned is_preempt_*() into preempt_model_*() (Frederic) It breaks my rule of "booleans must answer a yes/no question" but is the best I could come with using a "preempt_" prefix o Added preempt_model_preemptible() (Marco) Now used in kcsan_test.c o Dropped powerpc changes Cheers, Valentin Valentin Schneider (4): preempt: Restore preemption model selection configs preempt/dynamic: Introduce preemption model accessors kcsan: Use preemption model accessors ftrace: Use preemption model accessors for trace header printout include/linux/kernel.h | 2 +- include/linux/sched.h | 41 ++++++++++++++++++++++++++++++++++++++ include/linux/vermagic.h | 2 +- init/Makefile | 2 +- kernel/Kconfig.preempt | 42 +++++++++++++++++++-------------------- kernel/kcsan/kcsan_test.c | 5 +++-- kernel/sched/core.c | 18 ++++++++++++++--- kernel/trace/trace.c | 14 ++++--------- 8 files changed, 87 insertions(+), 39 deletions(-) -- 2.25.1